#include <iostream>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string>
#include <cstring>
#include "UdpServer.hpp"

int main(int argc,char *argv[])
{
    if(argc!=3)
    {
        std::cerr<<"Usage: "<<argv[0]<<"server_ip server_port"<<std::endl;
        return 1;
    }
    std::string server_ip=argv[1];
    uint16_t server_port=std::stoi(argv[2]);

    //1.创建socket
    int sockfd=socket(AF_INET,SOCK_DGRAM,0);
    if(sockfd<0)
    {
        std::cerr<<"socket error"<<std::endl;
        return 2;
    }
    //2.client端的不需要显式绑定，类似于公共电话和自己的手机号
    //填写服务器信息
    struct sockaddr_in server;
    memset(&server,0,sizeof(server));
    server.sin_family=AF_INET;
    server.sin_port=htons(server_port);
    server.sin_addr.s_addr=inet_addr(server_ip.c_str());
    while(true)
    {
        std::string input;
        std::cout<<"Please Enter# ";
        std::getline(std::cin,input);

        int n=sendto(sockfd,input.c_str(),input.size(),0,(struct sockaddr*)&server,sizeof(server));
        (void)n;

        char buffer[1024];
        struct sockaddr_in peer;
        socklen_t len=sizeof(peer);
        int m=recvfrom(sockfd,buffer,sizeof(buffer)-1,0,(struct sockaddr*)&peer,&len);
        (void)m;
    }
    return 0;
}